*{
    margin: 0;
    padding:0;
}
.caidan div{
    width: 100px;
    height:50px;
    border:1px solid red;
    text-align: center;
    line-height: 50px;
}
.shoplist{
    display: flex;
    justify-content: space-around;
}
.bg{
    display: flex;
    justify-content: space-between;
}